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# Check rrd file updating

Down in the same log, you should find some

    rrdtool update <filename> --template ...

You should find exactly one update statement for each file.

RRD files should be created by the poller. If it does not create them, it will not fill them either. If it does, please check your `Poller Cache` from Utilities and search for your target. Does the query show up here?

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